stevens



(No Model.)

A. W. 8v LEROY W. STEVENS, W. M. BRINKERHOFF 8v L. D. SWART. SPRING HARROW TOOTH. No. 405,923. Patented June 25, 1889.

umh) (21 www w t ma. @www UNITED STATES PATENT OFFICE.

ABRAM lV. STEVENS, LE ROY lV. STEVENS, VARREN M. BRINKERHOFF, AND

LESTER D. SVART, OF AUBURN, NEV YORK, ASSIGNORS TO A.- W. STE- VENS da SON, OF SAME PLACE.

SPRING HARRow-TooTH.

SPECIFICATION forming part of Letters Patent No. 405,923. dated J' une 25, 1889.

Application filed March 27, 1889. Serial No. 304,963. (No model.)

To all wil/m it 11mg/ concern.-

Be it known that we, ABRAM lV. STEVENS, LE ROY W. STEVENS, WARREN M. BRINKEE- HOFF, and LESTER D. SWART, citizens of the United States, residing at Auburn, in the county of Cayuga and State of New York, have invented certain new and useful Improvements in Spring llarrow-rleeth; and we do hereby declare the following to be a full,

lo clear, and exact description of the invention, such as will enable others skilled in the art to which it appertai ns to make and use the same.

Ourinvention is an improvement in springteeth for harrows; and it consists in an im- [5 proved steel point for attachment to springteeth, and in the means whereby such points are secured to the main body of the tooth.

Referring to the drawings, Figure l is a perspective view of a harrow-tooth with one 2o of our points attached. Figs. 2 and 3 are rear views of the lower part of a tooth, showing two different modes of attaching the point. Fig. 4. is a Inodied form of blade or point, and Fig. 5 is a rear view showing the mode of attaching the same.

A is the main body of the tooth, which is of the usual arched or curved form, showing one of its broad faces presented to the front. lVe prefer to give this main body a quarter-turn 3o a short distance above the point, as shown in the drawing; but we do not claim this feature alone as of our present invention. The point at which the main body is given the quarter turn or twist should in most casesy be at or 3 5 just above the surface of the ground.

In Figs. 2 and 3 I) b are the two parts of our improved attaching-clip for the point, which are, as shown, formed by bending the portion extending from an edge of the blade 4o backward in the rear of the main body of the point, and forming ears, which are perforated to receive a securing bolt or rivet b', which passes through them and the part a of the tooth. In Fig. 2 we show the point secured by a bolt, and in Fig. 3 by a rivet. By using a rivet a non-adjustable fastening' is secured, which is not liable to become loosened by use, the constant jar and motion tending to loosen fastenings-such as bolts and the like-which provide for adjustment. In both 5o modes of attachment the ears are made integral with the main body of the point. In Fig. 2 they extend downwardly from the top of the point, and in Fig. 3 inwardly from the sides of the same.

In each instance in operation the earth passes over the blade or point without coming into contact with the ears and the attaching bolt or rivet. This means of fastening leaves the front surface of the point or 6o blade unbroken, and the teeth are rendered less liable to clog.

In Fig. el. a form of blade or point is shown varying somewhat from the form shown in the other figures. This blade has a portion having an angular or V shaped front edge, the apex of which projects forwardly and eX- tends downwardly along the part a of the tooth and vanishes in the upper part of the broad portion of the blade. The whole of 7o the point or blade is given a high polish. This point or blade may be attached in any preferred way to the main body of the tooth. lVhen employed in connection with a tooth having a portion a with a narrow front edge, the top of the same should be a little below the turn or twist of the tooth.

One method of attachment resembling that already described is shown in Fig. 5, the side walls of the blade being provided with ears 8o b l), and a securing-bolt passing through them and the end of the tooth.

lVhat we claim, and desire to secure by Let ters Patent, is-

l. The combination, with a sp1-ing harrow 85 or cultivator tooth, having at its lower end a portion with a narrower face to the line of draft than the main body of the same, of an eartlrengaging point or blade, having at its rear portions extending inwardly from an 9o edge of the blade and secured to the narrower portion of the tooth, substantially as described.

2. The combination, with a spring harrow or cultivator tooth, having at its lower end a 9 5 portion cdgewise to the line of draft, of an earth-engaging point or blade having at the rear bent portions extending inwardly from an edge of the blade and secured to the edgewise portion of the tooth, substantially as described.

3. The combination, vwith the main portion of a spring harrow or cultivator tooth, having at its lower end a portion edgewise to the line of draft, of an earth-engaging blade or point having at its rear portions extending in- Wardly from an edge of the blade, and secured to the edgewise portion of the tooth by a non-adjustable connection, sbstantially as described.

4. An earth-engaging point or blade for a I barrow-tooth, having a broad fiat lower eXu trelnity, and having a V-shaped portion the 15 forwardly-projecting apex of Which extends downwardly and vanishes in the upper part ofthe broader portion, substantially as described.

In testimony whereof We affix our signatures 2o in presence of two Witnesses. l

ABRAM W. STEVENS. LE ROY W. STEVENS. WARREN M. BRINKERHOFF. LESTER D. SWART. Witnesses:

CHARLES B. QUICK, WALTER A. NYE. 

